iPadOS 12.1 (build 16B5068i) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2018-10-02T17:11:26Z. The update package is 341.21 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6c4aa75cae90f2d9b76f08b0ae42ea00ec01b07f.zip.